Your headshot work is outstanding. I spent some time looking at your web site and the imagery is superb.

The 100L is a sensational lens for portraiture and headshot work. There is zero distortion from the lens. Zero. It is absolutely razor sharp wide open. Stop it down to f/3.5 or f/4 and to my eyes I have never seen a sharper lens. It's a joy to hand hold. The IS does come in handy. Even if you don't use IS now I predict you will fall in love with it quickly. It's THAT good. I really think you should give it a try for a few headshot sessions. If you don't fall head over heels in love with the 100L I would be very, very surprised.